Idaho Book and School Supply is a great resource for parents and for teachers. The store has workbooks on every subject, from math to reading, to English, to Spanish, and more. The books come at all levels, from elementary grades to junior and senior high students.
If students are working on a particular project for science or social studies, there are lots of supplemental items, also.
Teachers can get posters for their class, manipulatives for math, general supplies, such as grade books, and much more.
It is hard to go in there and not find a handful of great educational tools, whether you are a parent or teacher.